Improvement in apparatus for drying



ZSheets-Sheetl. S. R. BRADLEY.

APPARATUS. FOR DRY G. No.173,889. P ted Feb.2Z,1876.

INVENTOR.

N- PETERS, PHOTO-LXTHGGRAPHER, WASHINGTON. D C.

2SheetsSheet2. S. R. BRADLEY.

APPARATUS FOR DRYING.

Mfr 3,839, Patentecl Feb. 22, 1876.

Fig. 2.

i I 1 ,L

A E%1G'\ C f UT A h WWWWIHHHHHHHHH!WW MW MUKMIUIMMAMIAIMUMUUUI Mil- WITNESSES INVENTOR NAPETERS, PHOTO-UTHOGRAFNER. WASHINGTON D C,

UNITED STATES PATENT OFFIJCE.-

STEPHEN B. BRADLEY, OE BROOKLYN, NEW YORK.

IMPROVEMENT IN APPARATUS FOR DRVlNG.

Specification forming part of Letters Patent No. 173,889, 'laed February 22, 1876 application filed December 18, 1873.

To all whom it may concern paratus, showing the edge of the two belts when applied to work upon calender-rolls. Fi g. 2 is a side elevation of the same machine.

As will be seen by a reference to the draw ing, the two belts, as at A and B, are arranged to travel around a series of rolls, as at U C,

which may be simply carrier rolls to both the belts in such proximity to a hopper, as at D, as that the material to be dried may readily fall from the hopper'to apoint between the two belts and then be conducted by and between them to and partially around a calenderroll, as at E, on one side of the machine, and thence across to another heated or calender roll, as at F, and so on back and forth over as many rolls as may be required for the operation, until the substance is sufl'icicntly dry to allow the belts to be separated, or the operation is completed, where the two belts are so conducted around the rolls as at G G, which separates them and the material either falls oft", or isbrushed, scraped, or removed by the revolving brushes H H, which act upon the belts as they traverse the various rolls. Said It is also evident that the belts for carrying the substances must be of some open or porous materials, so that evaporation can take place through them.

7 The hopper at the top must also be con- 'structed in such a manner as to guide the material properly between the belts, and maybe provided with slides or valves, so as to graduate the proper quantity to be properly dried before the belts separate. This, of course, will depend upon the quantity of moisture and the drying capacity of the air.

An exhausti'an may also be used in combination with such an apparatus; and so. also, may a thermostat or a hygrometric apparatus be arranged to control the supply'ot' material to the belts,-as in the drying of colors it is often essential that the temperature should not riseabove a certain point, and as they will be introduced between the belts in a liquid Witnesses:

SAML. F. HAY, BOYD ELIOT. 

